Roof ventilator



Dec. 9, 1924- 1,518,691

D. CRAIG ROOF VENT ILATOR Original Filed Feb. 13, 1919 Patented Dec. 9, 1924.

7 UNITED STATES PATENT oFFlcE.

DAVID CRAIG, or PEAIBODY, MASSACHUSETTS, 'ASSIGNoR or ONE-HALF T0 CHARLES H. LOVSEY, 0F PITTSBURGH, PENNSYLVANIA.

ROOF VENTILATOR.

Original application filed February 13, 1919, Serial No. 276,790 Divided and this application filled August 9. 1922. Serial No. 580,630.

To all whom it may concern:

Be it known that I, DAVID CRAIG, a citizen of the United States of America, and resident of Peabody, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Roof Ventilators, of which the following is a specification.

This invention relates to a roof ventilator and more particularly to a roof ventilator for houses, garages, and other buildings adapted to be made in sections and set up by unskilled workmen, this being a division of my copending application, Serial N 0. 276,790, filed Feb. 18, 1919, patented, No. 1,427,943, Sept. 5, 192

The objects of the invention are to provide a roof ventilator of the type described which has improved ventilating means and apparatus by which the ventilaing means may be controlled and adjustedat will, and in general to. provide a roof ventilator which is superior to the ordinary type of ventilator. e

Other objects of the invention will be apparent fromthe preferred embodiment of the invention illustrated in the accompanying drawings, in which: I

Fig. 1 is a top plan of a portion of the roof, parts being broken away; and

Fig. 2 is avertical sectional view of the central portion of the roof. I

The particular embodiment of the invention shown for the purpose of illustration comprises in general a centerpiece GP, a plurality of hypotenuse or corner rafters H, a plurality of central rafters R sloping downwardly from the centerpiece between the hypotenuse rafters, a plurality of minor rafters M sloping outwardly from the hypot- 'enuse rafters in parallelism with the center rafters, a king-post K extending downwardly from the centerpiece, and. a plurality of roof sections S covering the spaces between the rafters.

The oenterpiece'CP is made hollow so'that the roof may be ventilated therethrough and is preferably made cylindrical as illustrated. Ventilating openings are provided above and beneath the level of the roof either in the ends or sides or in both the ends and the sides of the centerpiece.

In the drawings I have shown the centerpiece as being'open throughout its entire upper end and as having aplurality of openings '1 in its lower end and a plurality of openings 2 in its peripheral wall beneath the roof. As shown in Fig. l the centerpiece is preferably provided withridges 3 on the inside between the openings 1 and 2 to strengthen the same. The centerpiece is preferably provided with a hollow portion 1 into the lower end of which is threaded the tubular king-post K. A rod 5 extends through the tubular king-post K and the axial portion't of the centerpiece and on the upper end of this rod is mounted a disk 6 havingv a flared peripheral portion 7 to which is secured an annular band 8, the disk 6 preferably being of somewhat greater diameter than the centerpiece and the band 8 preferably extending to or below the level of the upper end of the centerpiece to serve as a cover for the upper end thereof. An ornamental weight 9 may be mounted on the upper end of the rod above the disk 6. To the lower end ofthe rod 5 is connected a lever 10 which is pivotally mounted on a collar 11 threaded upon the lower end of the king-post K, a pawl and ratchet mechanism 12 being provided to hold the lever in adjusted position. By adjusting the lever 10 the disk 6, which serves as a damper to control the effective size of the opening through the centerpiece may be raised or lowered to vary the rate of ventilation.

The hypotenuse rafters comprise a metallic plate 13 to each side of which is secured a wooden strip 15. The central raftersare formed in a similar manner in that they comprise a central metallic plate 16 and wooden strips 17 secured to the side of the center plate.

The hypotenuse rafters and the central rafters are secured to the centerpiece by means of T-shaped lugs 20 the lateral p0rtions of which fit along the centerpiece and the longitudinal portions of which extend outwardly along the metallic plates of the rafters as illustrated in Fig. 1.

The outer ends of the rafters are connected to the lower end of the king-post K by means of tie-beams 23 which are connected to the king-post through the mechanism of turn-buckles 24: and -clevises 25 which fit over and are pivoted to a collar 26 on the lower end of the king-post. The collar is threaded on the king-post K so that it may be vertically adjusted along thekin'gpost before the tie-beams are connected thereto. The collar 26 is provided with ver-- tical flanges 27 to which braces 28 may be connected,.thebraces being connected at their opposite ends to the hypotenuse and central rafters intermediate the ends of the rafters. V I

After the roof sections have been put in place, battens 33 are placed over the central rafters so as to overlap the roof sections and the parts are secured together by suitable bolts. The central metallic plate 13 ofthe hypotenuse rafters extends somewhat above the level of the boards forming. the upper surface of the'roof sections S, viz, a distance equal to the thickness ofthe battens of the minor rafters, and onboth sides of the upstanding portions of the plates 13 are mounted filling strips 87. Over 7 the filling strips 37 is mounted a batten 38 which is Y-shaped in cross section and which extends outwardly beyond the filling strips 37.

After the roof sections and battens have been secured in position a lead flashing F.

is fitted around the centerpiece and over theportions of the roof sections andbattens immediately surrounding the centerpiece. The flashing F is folded inwardly :over the upper edge of the centerpiece at its: upper end and at its lower end the flashing is fitted over hypotenuse battens38. c

From the above it is ap arent .thatthe ventilating; apparatus for t eroof is builtv into orarranged-to form anessential portion of the frame of the roof structure, that means are provided-in a convenient'position for positively controlling. the ventilating. apparatus, that the roof is effectively sealed against leakage when the ventilator is closed, andrthat by virtue of the features ofconstruction herein disclosed all of the aforesaid objects are attained, as-well as other advantages which will be obvious to those skilled in the art.

. I'claim:

1. In roof. construction the combination with a cup-like metal member open at the top, of hypotenuse rafters having flange portions fitting around the upper. portion of the cup, said cup having lateral ventilation apertures formed therein immediately beneath the point of engagement by the rafters, whereby the cup member provides a connecting support for the rafters, and a central king-postsecuredto and dependingfrom the cup; tie? beams connecting the king-post and rafters; the cupmember being open at the top and having apertures formed therein beneath the point of engagement of the hypotnuse rafters therewith, a cover member for the cup, and control means carried by the hollow king-post and operating through said post to regulate-the position: of thecover. a

3. A center-piece for; sectional buildingscomprising a tubular member and afcent'er pro ection withinsaid member, braces connecting the tubular member and projection:

forming sector-like comp artments, said com partments being open at the top and atthe lower-portion, and the tubular member' having rafter engaging portionsabo-ve said lower.

open portion, whereby ,thetubularmember serves both as a braced rafter connection and:

a ventilator from the space below to. the spaceabove the rafters.

i. A enter-piece for sectional-buildings comprising a tubular memberand a center.

projection within said member, braces ,con-

n'ecting the. tubular member and projection forming sector-like compartments, said compartments being open 1 at the top and at the lower portion, and the'tubular. member having rafter engaging portions above saidlower open portion whereby. .the tubular member serves both as a braced raftercone nection and a ventilatorfrom the space below to the space above'the rafters,-the projection being hollow, and draft controllin means supported by the 'tubularmember and controllable through said hollowlporjection.

5. In roof construction a tubular center,- piece, brace members pro ect1ng;i1nwardly from the tubular member,v rafters having;

their termini engagingthe exteriorof the tubular member adgacent said braced.por

tions thereof, the ,tubular; member havingi ventilation apertures formed therein. below thepoint of engagement. by the rafters, a-

cover for the tubulaiflmeinberofigreater diameter than such member, said {cover hav}, mgadependmg peripheral flange portion,

means on the tubular member for support-r ing. said 7 cover, and means for variably =2LCl-J justingthe position of thecover as respectsthe tubular member.

6. In roof construction, a roofcomprising rafters a center-piece of'tubula'r form having a base port on at one end, the'base POItlOli:

havinga hollow upward extension within;

the tubular member, anda depending-king:

post receiving boss, aking-p0st carried therethe tubular member for controlling the draft by, the lower portion of the tubular member therethrough, and regulating means therefor and the base having ventilation apertures adjustably supported by the king-post and 10 formed therein, and the upper portion beprojecting upwardly through said post.

5 ing continuous to provide a center-piece igned by me at Boston, Mass, this 2nd bracingly engaging the termini of said clay of August, 1922. rafters, means overlapping the upper end of DAVID CRAIG. 

